Earthquake with magnitude of M 2.8 on date 17-02-1985 and time 11:28:30 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude M 2.8 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 17-02-1985 10:28:30 (UTC)
  • 17-02-1985 11:28:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.28, 6.91 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Pietraporzio CN 12 77 77
Argentera CN 12 83 160
Sambuco CN 15 92 252

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km W of Cuneo (56081 inhabitants)
87 Km NW of Sanremo (54807 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 M 2.8 1985-02-17
10:28:30
44.28 6.91 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1879
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-17 10:28:30 ± 0.369
Latitude 44.28 ± 0.02
Longitude 6.91 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1879

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2964.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 241
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.00882
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

M:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1879
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.LMR.Z. 1985-02-17T10:29:03.90 10.0 undecidable manual SG 197 0.0088 -0.42 0.3
--.FIN.Z. 1985-02-17T10:29:02.40 10.0 undecidable manual SG 94 0.0083 -0.14 0.7
--.LRG.Z. 1985-02-17T10:29:02.40 10.0 undecidable manual SG 206 0.0082 0.45 0.5
--.IMP.Z. 1985-02-17T10:28:58.80 10.0 undecidable manual SG 117 0.0071 0.73 0.1
--.FRF.Z. 1985-02-17T10:28:55.90 10.0 undecidable manual SG 195 0.0066 -0.55 0.2
--.ROB.Z. 1985-02-17T10:28:54.80 10.0 undecidable manual SG 88 0.0062 0.07 0.9
--.LMR.Z. 1985-02-17T10:28:50.10 10.0 undecidable manual PG 197 0.0088 0 1.8
--.LRG.Z. 1985-02-17T10:28:49.60 10.0 undecidable manual PG 206 0.0082 0.87 0.3
--.FIN.Z. 1985-02-17T10:28:48.90 10.0 undecidable manual PG 94 0.0083 -0.18 1.6
--.IMP.Z. 1985-02-17T10:28:47.00 10.0 undecidable manual PG 117 0.0071 0.5 1.1
--.FRF.Z. 1985-02-17T10:28:45.20 10.0 undecidable manual PG 195 0.0066 -0.36 1.1
--.ROB.Z. 1985-02-17T10:28:44.70 10.0 undecidable manual PG 88 0.0062 0.13 2.2
--.ENR.Z. 1985-02-17T10:28:44.50 10.0 undecidable manual SG 98 0.0033 0.05 0.9
--.STV.Z. 1985-02-17T10:28:42.00 10.0 undecidable manual SG 95 0.0027 -0.29 0.6
--.ENR.Z. 1985-02-17T10:28:38.70 10.0 undecidable manual PG 98 0.0033 0.06 2.2
--.STV.Z. 1985-02-17T10:28:37.10 10.0 positive manual PG 95 0.0027 -0.29 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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